Revert 253c922: restore the PM/RBAC work to the integration

Reverting the production revert so the pm branch can merge cleanly on
top of the restored RBAC base. Conflicts against newer integration work
resolved by combining:
- App.tsx: v7's bot-draft wizard bypass + login returnUrl kept alongside
  the supervisor gating (no-project block screen, panel scoping)
- LoginPage: returnUrl navigation kept, supervisor routing added
- migration.sql: bot_drafts table kept, unified-projects ALTERs restored

frontend/src/pages/Inventory/InventoryTopNav.tsx

@@ -1,26 +1,32 @@
 import { Link } from "react-router-dom";
 import { Button } from "../../components/ui/button";
 
+import { useAuthStore } from "../../store/auth";
+
 // ناوبری بالای صفحه در پنل انبار — هماهنگ با دیزاین‌سیستم دکمه‌ها
 export function InventoryTopNav({
   pathname,
-  variant = "pm",
 }: {
   pathname: string;
-  variant?: "pm" | "admin";
 }) {
-  const items =
-    variant === "admin"
-      ? [
-          { label: "کنترل روزانه", to: "/inventory/daily", active: pathname.startsWith("/inventory/daily") },
-          { label: "کالاهای در راه", to: "/inventory/arrivals", active: pathname.startsWith("/inventory/arrivals") },
-          { label: "سازمان‌دهی", to: "/inventory/org", active: pathname.startsWith("/inventory/org") },
-        ]
-      : [
-          { label: "کنترل روزانه", to: "/inventory/daily", active: pathname.startsWith("/inventory/daily") },
-          { label: "انبارها", to: "/inventory/warehouses", active: pathname.startsWith("/inventory/warehouses") },
-          { label: "کالاهای در راه", to: "/inventory/arrivals", active: pathname.startsWith("/inventory/arrivals") },
-        ];
+  const user = useAuthStore((s) => s.user);
+  const isAdmin = user?.role === "admin";
+  const isManager = user?.role === "procurement_manager" || user?.role === "pm" || isAdmin;
+
+  const items: { label: string; to: string; active: boolean }[] = [];
+  // سرپرست پروژه از دکمه شناور گرد (+) در پایین صفحه استفاده می‌کند و دکمه مستطیلی بالای صفحه برای او نمایش داده نمی‌شود
+  if (isAdmin) {
+    items.push({
+      label: "تغییر موجودی",
+      to: "/inventory/change",
+      active: pathname.startsWith("/inventory/change"),
+    });
+  }
+  if (isManager) {
+    items.push({ label: "کنترل روزانه", to: "/inventory/daily", active: pathname.startsWith("/inventory/daily") });
+    items.push({ label: "انبارها", to: "/inventory/warehouses", active: pathname.startsWith("/inventory/warehouses") });
+    items.push({ label: "کالاهای در راه", to: "/inventory/arrivals", active: pathname.startsWith("/inventory/arrivals") });
+  }
 
   return (
     <>